München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 78: Beschleunigerphysik 1

T 78.1: Talk

Monday, March 9, 2009, 17:00–17:15, A213

sFLASH: A seeding project for a XUV FEL — •Jörn Bödewadt¹, Armin Azima¹, Francesca Curbis¹, Hossein Delsim-Hashemi¹, Markus Drescher¹, Stefan Düsterer⁴, Josef Feldhaus⁴, Rasmus Ischebeck⁵, Shaukat Khan³, Tim Laarmann⁴, Theophilos Maltezopoulos¹, Atoosa Meseck², Velizar Miltchev¹, Manuel Mittenzwey¹, Jörg Rossbach¹, Holger Schlarb⁴, Sebastian Schulz¹, Roxana Tarkeshian¹, and Marek Wieland¹ — ¹Uni HH, Hamburg — ²HZB, Berlin — ³DELTA, Dortmund — ⁴DESY, Hamburg — ⁵PSI, Villigen

A seeded free-electron laser operating in the soft X-ray (XUV) spectral range will be added to the SASE FEL facility FLASH. For this purpose, a 40 m long section upstream of the existing SASE undulator will be rebuilt during the shutdown in fall 2009. This includes the injection of the seed beam into a new 10 m variable-gap undulator, the out-coupling of the seeded FEL radiation and all diagnostics for photon- and electron beams. The XUV seed pulse is generated by high harmonics (HHG) from a near-infrared laser, optically synchronized with FLASH. After amplification within the undulators the XUV light will be guided towards diagnostic stations. Besides a proof-of-principle demonstration for seeding at short wavelength the purpose of this development is to provide future pump-probe experiments with a more stable FEL source in terms of spectral properties and timing.